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linux-user: Implement force_sigsegv() via force_sig() 

Now that we have a force_sig() with the semantics we need,
we can implement force_sigsegv() to call it rather than
open-coding the call to queue_signal().

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Peter Maydell 2016-07-28 16:44:50 +01:00 committed by Riku Voipio
parent c599d4d6d6
commit c4b3574402
1 changed files with 2 additions and 15 deletions
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17
linux-user/signal.c
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@ -512,8 +512,7 @@ void signal_init(void)
}
}
#if !defined(TARGET_OPENRISC) && !defined(TARGET_UNICORE32) && \
!defined(TARGET_X86_64)
#if !(defined(TARGET_X86_64) || defined(TARGET_UNICORE32))
/* Force a synchronously taken signal. The kernel force_sig() function
* also forces the signal to "not blocked, not ignored", but for QEMU
* that work is done in process_pending_signals().
@ -531,9 +530,6 @@ static void force_sig(int sig)
info._sifields._kill._uid = 0;
queue_signal(env, info.si_signo, QEMU_SI_KILL, &info);
}
#endif
#if !(defined(TARGET_X86_64) || defined(TARGET_UNICORE32))
/* Force a SIGSEGV if we couldn't write to memory trying to set
* up the signal frame. oldsig is the signal we were trying to handle
@ -541,22 +537,13 @@ static void force_sig(int sig)
*/
static void force_sigsegv(int oldsig)
{
CPUState *cpu = thread_cpu;
CPUArchState *env = cpu->env_ptr;
target_siginfo_t info;
if (oldsig == SIGSEGV) {
/* Make sure we don't try to deliver the signal again; this will
* end up with handle_pending_signal() calling dump_core_and_abort().
*/
sigact_table[oldsig - 1]._sa_handler = TARGET_SIG_DFL;
}
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SI_KERNEL;
info._sifields._kill._pid = 0;
info._sifields._kill._uid = 0;
queue_signal(env, info.si_signo, QEMU_SI_KILL, &info);
force_sig(TARGET_SIGSEGV);
}
#endif